Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0515a3938300da7b14b15109b4c6c30fb81923ed1ab9df1d64a9bcdfe3344cfd' 
  AND token = 'FoyUlrtsGim42VjM3Xt6jgs34GNwRQPedemGsVPkPrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}